CN222507442U - A new type of high voltage circuit breaker - Google Patents

Abstract

The utility model discloses a novel high-voltage circuit breaker, and relates to the technical field of high-voltage circuit breakers. The single-body circuit breaker comprises a shell, wherein a fixed contact, a moving contact, a vacuum arc-extinguishing chamber, an insulator and a permanent magnet mechanism are arranged in the shell, the upper end of the fixed contact is connected with an upper wiring terminal, the lower end of the fixed contact is inserted into the vacuum arc-extinguishing chamber, the lower end of the moving contact is connected with the permanent magnet mechanism through the insulator, the upper end of the moving contact is slidably inserted into the vacuum arc-extinguishing chamber, the moving contact is connected with a lower wiring terminal, and the permanent magnet mechanism comprises an upper cover body, a lower cover body, a movable main shaft, an inner spring, an outer spring, a fixed end, a movable end, a magnetic ring and a coil structure. The novel high-voltage circuit breaker adopts an intensive design, and can be used for arranging the permanent magnet mechanism, the fixed contact, the moving contact and the vacuum arc-extinguishing chamber in the same vertical shell, so that the high-voltage circuit breaker can be applied in a narrow space.

Description

Novel high-voltage circuit breaker

Technical Field

The utility model relates to the technical field of high-voltage circuit breakers, in particular to a novel high-voltage circuit breaker.

Background

The high-voltage circuit breaker is a main control device in a circuit of more than 1000 KV. And in case of failure, the load current is used for rapidly breaking short-circuit current and cutting off the failure. The permanent magnet mechanism for controlling opening and closing is a core component of a circuit breaker, in the prior art, the permanent magnet mechanism is complicated in structure and large in volume, generally cannot be placed in the same shell with a vacuum arc-extinguishing chamber, but is placed in a separately arranged driving shell, and a communication rod drives a moving contact inserted into the vacuum arc-extinguishing chamber to move, so that the permanent magnet mechanism is an external structural form of the permanent magnet mechanism, namely a three-phase permanent magnet mechanism indoor high-voltage circuit breaker for single-phase operation, which is disclosed in Chinese patent No. CN 104299836A. The existing design causes the overall size of the high-voltage circuit breaker to be larger, and the high-voltage circuit breaker cannot be applied to operation occasions in narrow spaces such as underground explosion-proof switches. If the design size of the existing permanent magnet mechanism is simply reduced and then the permanent magnet mechanism and the vacuum arc-extinguishing chamber are arranged in the same shell, the pulling force of the permanent magnet mechanism to the moving contact is reduced due to the reduction of magnetic flux, and the quick power-off requirement of a high-voltage circuit cannot be met.

In view of this, the applicant has developed a new high-voltage circuit breaker, which adopts an intensive design, and can set the permanent magnet mechanism, the fixed contact, the moving contact and the vacuum arc-extinguishing chamber in the same vertical housing, so that the high-voltage circuit breaker can be applied in a narrow space.

Disclosure of utility model

The utility model aims to solve the problems in the background and provides a novel high-voltage circuit breaker.

The utility model provides a novel high-voltage circuit breaker, which comprises a single circuit breaker, wherein the single circuit breaker comprises a shell, a fixed contact, a movable contact, a vacuum arc-extinguishing chamber, an insulator and a permanent magnet mechanism are arranged in the shell, the upper end of the fixed contact is connected with an upper wiring terminal, the lower end of the fixed contact is inserted into the vacuum arc-extinguishing chamber, the lower end of the movable contact is connected with the permanent magnet mechanism through the insulator, the upper end of the movable contact is slidably inserted into the vacuum arc-extinguishing chamber, the movable contact is connected with a lower wiring terminal, the permanent magnet mechanism comprises an upper cover body, a lower cover body, a movable main shaft, an inner spring, an outer spring, a fixed end, a movable end, a magnetic ring and a coil structure, the fixed end comprises an outer pole body and an inner pole body, the outer pole body and the inner pole body are coaxially fixed at the lower end of the upper cover body, a plurality of support columns are arranged in a ring-shaped array at the lower end of the outer pole body, the lower end of the support columns is fixedly provided with a lower cover body, the movable end is sleeved on the support columns between the outer pole body and the lower cover body, and the movable end is provided with the coil structure;

The movable main shaft penetrates through the upper cover body, the fixed end head, the movable end head and the lower cover body from top to bottom, an annular boss is arranged on the outer wall of the shaft body, which is positioned in the fixed end head, an inner spring is sleeved on the movable main shaft, the upper end of the inner spring abuts against the annular boss, the lower end of the inner spring abuts against the movable end head, an outer spring is sleeved outside the inner spring, the upper end of the outer spring abuts against the upper cover body or the fixed end head, the lower end of the outer spring abuts against the movable end head, the upper end of the movable main shaft is connected with a movable contact through an insulator, and an adjusting nut is arranged on the outer wall of one end, which downwards penetrates out of the movable end head, of the movable main shaft through threads.

As a still further scheme of the utility model, the coil structure comprises a coil bracket, and a coil winding group is coiled on the coil bracket.

As a still further scheme of the utility model, the magnetic ring comprises more than three permanent magnet blocks, and the permanent magnet blocks are annularly arranged around the central axis of the inner machine body.

As a still further scheme of the utility model, a copper sleeve body is fixed below the upper cover body, the upper end of the outer spring is abutted against the copper sleeve body, the lower end of the outer spring is abutted against the movable end head, and the inner spring and the outer spring are coaxially sleeved and do not interfere with each other in the telescoping process.

As a still further proposal of the utility model, the movable end is in a circular ring shape, the middle shaft part of the movable end is provided with a through hole matched with the movable main shaft, the movable end is coaxially provided with an inner ring groove and an outer ring groove with open upper ends from outside to inside, the lower ends of the inner spring and the outer spring are abutted against the lower bottom surface of the inner ring groove, and the coil structure is arranged in the outer ring groove.

The movable end is sleeved on the support column in a sliding way through the guide holes, the aperture of the guide holes is larger than the thickness of the outer wall of the outer ring groove, and strip-shaped grooves penetrating the inner side and the outer side are formed.

The utility model further provides a synchronous coupling, wherein the synchronous coupling is in a sleeve shape with an open upper end and a closed lower end, the upper end of the synchronous coupling is fixed on the lower bottom surface of the movable end through a bolt, a sleeve accommodating cavity is formed in the synchronous coupling, the lower end of the movable main shaft and an adjusting nut are arranged in the sleeve accommodating cavity, and a connecting hole is formed in a solid shaft body part at the lower end of the synchronous coupling.

The utility model further provides a base, three single circuit breakers are arranged on the base and connected into a three-phase circuit, a controller and a capacitor are arranged on the base, the controller can control the capacitor to discharge, when the capacitor is discharged in the forward direction, the three single circuit breakers are synchronously switched on, and when the capacitor is discharged in the reverse direction, the three single circuit breakers are synchronously switched off.

Compared with the prior art, the utility model has the beneficial effects that:

1. the novel high-voltage circuit breaker adopts an intensive design, and can be used for arranging the permanent magnet mechanism, the fixed contact, the moving contact and the vacuum arc-extinguishing chamber in the same vertical shell, so that the high-voltage circuit breaker can be applied in a narrow space.

2. The utility model improves the structure of the permanent magnet mechanism to make the design more compact, especially improves the structure of the movable end head to enable the movable end head to be in synchronous contact with the outer pole body and the inner pole body of the fixed end head, increases the magnetic flux, improves the driving force for driving the movable contact to move, and enables the circuit breaker to be suitable for on-off operation of high-voltage circuits with various specifications and to have stronger universality.

In addition, through carrying out special design with the guiding hole of seting up on the movable end, the guiding hole aperture is greater than the outer wall thickness of outer loop groove and forms the bar fluting that inside and outside run through, can further optimize the inside magnetism induction line distribution of movable end, reduce the vortex, reduce the magnetic loss.

3. Through the structural improvement to the synchronous coupling, can make the three monomer circuit breakers of assembly on the base, the synchronous coupling of dismantlement that can be convenient and adjust adjusting nut in the epaxial position of activity to make the synchronous rate of three monomer circuit breakers higher.

Drawings

Fig. 1 is a schematic perspective view of a single body circuit breaker according to the present utility model;

fig. 2 is a schematic view of an internal structure of the single body circuit breaker of the present utility model;

FIG. 3 is a schematic perspective view of a permanent magnet mechanism according to the present utility model;

Fig. 4 is a schematic perspective view of the permanent magnet mechanism (without the upper cover body) of the present utility model;

FIG. 5 is a schematic diagram of the internal structure of the permanent magnet mechanism (without coil winding);

FIG. 6 is a schematic diagram of the installation structure of the fixed end and the magnetic ring of the present utility model;

FIG. 7 is a schematic perspective view of a movable end of the present utility model;

fig. 8 is a schematic perspective view of embodiment 3 of the present utility model;

fig. 9 is a schematic side view of embodiment 3 of the present utility model.

The device comprises a shell, an upper wiring terminal, a lower wiring terminal, a moving contact, a 5, an insulator, a 6, a permanent magnet mechanism, a 601, a fixed end, a 6011, an inner pole body, a 6012, an outer pole body, a 602, a movable end, a 6021, a through hole, a 6022, an inner ring groove, a 6023, a guide hole, a 6024, an outer ring groove, a 603, an adjusting nut, a 604, a lower cover body, a 605, a support column, a 606, an upper cover body, a 607, a movable main shaft, a 608, a permanent magnet block, a 609, an outer spring, a 610, an inner spring, a 611, a coil bracket, a 7, a synchronous coupler, a 701, a connecting hole, an 8, a static contact, a 9, a vacuum arc extinguishing chamber, a 10, a base, a 11, a controller, a 12 and a capacitor.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Example 1

Referring to fig. 1-2, the novel high-voltage circuit breaker comprises a single circuit breaker, the single circuit breaker comprises a shell 1, a fixed contact 8, a moving contact 4, a vacuum arc-extinguishing chamber 9, an insulator 5 and a permanent magnet mechanism 6 are arranged in the shell 1, the upper end of the fixed contact 8 is connected with an upper wiring terminal 2, the lower end of the fixed contact 8 is inserted into the vacuum arc-extinguishing chamber 9, the lower end of the moving contact 4 is connected with the permanent magnet mechanism 6 through the insulator 5, the upper end of the moving contact 4 is slidably inserted into the vacuum arc-extinguishing chamber 9, and the moving contact 4 is connected with a lower wiring terminal 3.

As shown in fig. 3-7, the permanent magnet mechanism 6 includes an upper cover 606, a lower cover 604, a movable main shaft 607, an inner spring 610, an outer spring 609, a fixed end 601, a movable end 602, a magnetic ring and a coil structure, wherein the fixed end 601 includes an outer pole 6012 and an inner pole 6011, the outer pole 6012 and the inner pole 6011 are coaxially fixed at the lower end of the upper cover 606 from outside to inside, the magnetic ring is installed between the inner pole 6011 and the outer pole 6012, a plurality of support columns 605 are arranged in a ring array at the lower end of the outer pole 6012, the lower end of the support column 605 is fixed with the lower cover 604, the movable end 602 is slidably sleeved on the support column 605 between the outer pole 6012 and the lower cover 604, and the coil structure is arranged on the inner wall of the movable end 602.

The movable end head 602 is provided with guide holes 6023 which are matched with the support columns 605 in number and position and penetrate through the support columns 605 up and down, the movable end head 602 is sleeved on the support columns 605 in a sliding mode through the guide holes 6023, and the aperture of the guide holes 6023 is larger than the thickness of the outer wall of the outer ring groove 6024 and strip-shaped grooves penetrating through the inner side and the outer side are formed.

The movable main shaft 607 penetrates through the upper cover body 606, the fixed end 601, the movable end 602 and the lower cover body 604 from top to bottom, an annular boss is arranged on the outer wall of the shaft body, which is positioned in the fixed end 601, of the movable main shaft 607, an inner spring 610 is sleeved on the movable main shaft 607, the upper end of the inner spring 610 abuts against the annular boss, the lower end of the inner spring 610 abuts against the movable end 602, an outer spring 609 is sleeved outside the inner spring 610, the upper end of the outer spring 609 abuts against the upper cover body 606 or the fixed end 601, the lower end of the outer spring 609 abuts against the movable end 602, the upper end of the movable main shaft 607 is connected with the movable contact 4 through an insulator 5, and an adjusting nut 603 is arranged on the outer wall of one end, which downwards penetrates out of the movable end 602, of the movable main shaft 607 through threads.

The coil structure comprises a coil support 611, and a coil winding group is coiled on the coil support 611.

The magnetic ring comprises ten permanent magnets 608, and the permanent magnets 608 are annularly arranged around the central axis of the inner machine body.

The copper sleeve body is fixed below the upper cover body 606, the upper end of the outer spring 609 is abutted against the copper sleeve body, the lower end of the outer spring 609 is abutted against the movable end head 602, and the inner spring 610 and the outer spring 609 are coaxially sleeved and do not interfere with each other in the telescoping process.

As shown in fig. 7, the movable end 602 is in a ring shape, a through hole 6021 matched with the movable spindle 607 is formed at the middle shaft portion of the movable end 602, an inner ring groove 6022 and an outer ring groove 6024 with open upper ends are coaxially formed on the movable end 602 from outside to inside, the lower ends of the inner spring 610 and the outer spring 609 are abutted against the lower bottom surface of the inner ring groove 6022, and the coil structure is arranged in the outer ring groove 6024.

The movable end head 602 is provided with guide holes 6023 which are matched with the support columns 605 in number and position and penetrate through the support columns 605 up and down, the movable end head 602 is sleeved on the support columns 605 in a sliding mode through the guide holes 6023, and the aperture of the guide holes 6023 is larger than the thickness of the outer wall of the outer ring groove 6024 and strip-shaped grooves penetrating through the inner side and the outer side are formed.

The working principle of the single body breaker is as follows:

First, the adjusting nut 603 is rotated, so that the distance between the adjusting nut 603 and the bottom end of the movable end 602 accords with the set value of the over-stroke. The adjusting nut 603 cooperates with the inner spring 610, so that even if the moving contact 4 and the fixed contact 8 wear out after long-term use, the elastic force and the over-travel compensation of the inner spring 610 can be utilized to push the moving contact 4 to move forward for a section of over-travel on the premise of completing the opening movement, so that the moving contact 4 and the fixed contact 8 can be fully contacted during closing, and the incomplete open-circuit condition of closing is avoided.

When the coil structure is charged to generate magnetic force, the movable end head 602 is attracted by the magnetic ring, moves upwards along the support column 605 until being attracted by the fixed end head 601, and can synchronously drive the inner spring 610 to move upwards and compress during the upward movement of the movable end head 602, meanwhile, the movable main shaft 607 is given with upward thrust, and the movable main shaft 607 drives the insulator 5 and the movable contact 4 to move upwards together under the action of the thrust until the movable contact 4 contacts with the fixed contact 8 in the vacuum arc extinguishing chamber 9, so that the closing operation is completed.

When the coil structure is powered off, the magnetic force weakens and gradually disappears, and because the outer spring 609 is always in a compressed state, at this time, the movable end head 602 is rapidly separated from the fixed end head 601 under the strong resilience action of the outer spring 609, the movable end head 602 firstly moves for a preset overstroke in the process of moving downwards along the support column 605, then contacts with the adjusting nut 603 and drives the movable main shaft 607 to move downwards through the adjusting nut 603, and the movable main shaft 607 can drive the movable contact 4 to be rapidly separated from the fixed contact 8 through the insulator 5, so that the opening operation is completed.

Example 2

As shown in fig. 8 and 9, in this embodiment, the device further includes a base 10, three single circuit breakers are installed on the base 10, the three single circuit breakers are connected to a three-phase circuit, a controller 11 and a capacitor 12 are arranged on the base 10, the controller 11 can control the capacitor 12 to discharge, when the capacitor 12 discharges in the forward direction, the three single circuit breakers are synchronously switched on, and when the capacitor 12 discharges in the reverse direction, the three single circuit breakers are synchronously switched off.

Example 3

As shown in fig. 2, 3 and 5, in this embodiment, the device further includes a synchronous coupling 7, the synchronous coupling 7 is in a sleeve shape with an open upper end and a closed lower end, the upper end of the synchronous coupling 7 is fixed on the lower bottom surface of the movable end 602 by a bolt, a sleeve accommodating cavity is formed in the synchronous coupling 7, the lower end of the movable spindle 607 and the adjusting nut 603 are disposed in the sleeve accommodating cavity, and a connection hole 701 is formed in a solid shaft portion at the lower end of the synchronous coupling 7.

Through the institutional advancement to the synchro-coupling 7, can make the three monomer circuit breakers of assembly on base 10, can implement the adjustment of adjusting nut 603 on movable main shaft 607 position through convenient dismantlement synchro-coupling 7 to make the synchronous rate of three monomer circuit breakers higher.

The foregoing description is only a preferred embodiment of the present utility model, but the scope of the present utility model is not limited thereto, and any person skilled in the art, who is within the scope of the present utility model, should make equivalent substitutions or modifications according to the technical solution of the present utility model and the inventive concept thereof, and should be covered by the scope of the present utility model.

Claims (8)

1. The novel high-voltage circuit breaker comprises a single circuit breaker body, wherein the single circuit breaker body comprises a shell (1), a fixed contact (8), a moving contact (4), a vacuum arc-extinguishing chamber (9), an insulator (5) and a permanent magnet mechanism (6) are arranged in the shell (1), the upper end of the fixed contact (8) is connected with an upper wiring terminal (2), and the lower end of the fixed contact (8) is inserted into the vacuum arc-extinguishing chamber (9); the lower end of the moving contact (4) is connected with a permanent magnet mechanism (6) through an insulator (5), the upper end of the moving contact (4) is inserted into a vacuum arc-extinguishing chamber (9) in a sliding way, the moving contact (4) is connected with a lower wiring terminal (3), the permanent magnet mechanism (6) comprises an upper cover body (606), a lower cover body (604), a movable main shaft (607), an inner spring (610), an outer spring (609), a fixed end head (601), a movable end head (602), a magnetic ring and a coil structure, the fixed end head (601) comprises an outer pole body (6012) and an inner pole body (6011), the outer pole body (6012) and the inner pole body (6011) are coaxially fixed at the lower end of the upper cover body (606) from outside to inside, a magnetic ring is arranged between the inner pole body (6011) and the outer pole body (6012), a plurality of support columns (605) are arranged in a lower annular array of the outer pole body (6012), the lower end of the support column (605) is fixed with a lower cover body (604), a movable end head (602) is sleeved on the support column (605) between the outer pole body (6012) and the lower cover body (604) in a sliding manner, and a coil structure is arranged on the inner wall of the movable end head (602);

The movable main shaft (607) penetrates through the upper cover body (606), the fixed end head (601), the movable end head (602) and the lower cover body (604) from top to bottom, an annular boss is arranged on the outer wall of the shaft body, which is positioned in the fixed end head (601), an inner spring (610) is sleeved on the movable main shaft (607), the upper end of the inner spring (610) abuts against the annular boss, the lower end of the inner spring (610) abuts against the movable end head (602), an outer spring (609) is sleeved outside the inner spring (610), the upper end of the outer spring (609) abuts against the upper cover body (606) or the fixed end head (601), the lower end of the outer spring (609) abuts against the movable end head (602), the upper end of the movable main shaft (607) is connected with the movable contact (4) through an insulator (5), and an adjusting nut (603) is arranged on the outer wall of one end, which downwards penetrates out of the movable end head (602), through threads.

2. A new high voltage circuit breaker according to claim 1, characterized in that the coil structure comprises a coil support (611), on which coil support (611) a coil winding group is wound.

3. The novel high-voltage circuit breaker according to claim 1, wherein the magnetic ring comprises more than three permanent magnets (608), and the permanent magnets (608) are annularly arranged around the central axis of the inner body.

4. The novel high-voltage circuit breaker according to claim 1, wherein a copper sleeve body is fixed below the upper cover body (606), the upper end of the outer spring (609) abuts against the copper sleeve body, the lower end of the outer spring (609) abuts against the movable end head (602), and the inner spring (610) and the outer spring (609) are coaxially sleeved and do not interfere with each other in the telescoping process.

5. The novel high-voltage circuit breaker according to claim 1, wherein the movable end head (602) is in a circular ring shape, a through hole (6021) matched with the movable main shaft (607) is formed in the middle shaft part of the movable end head (602), an inner ring groove (6022) and an outer ring groove (6024) with open upper ends are coaxially formed in the movable end head (602) from outside to inside, the lower ends of the inner spring (610) and the outer spring (609) are abutted against the lower bottom surface of the inner ring groove (6022), and the coil structure is arranged in the outer ring groove (6024).

6. The novel high-voltage circuit breaker according to claim 5, wherein guide holes (6023) penetrating up and down, which are matched with the number and the positions of the support columns (605), are formed in the movable end heads (602), the movable end heads (602) are sleeved on the support columns (605) in a sliding mode through the guide holes (6023), and the aperture of each guide hole (6023) is larger than the thickness of the outer wall of the outer ring groove (6024) and forms strip-shaped grooves penetrating in the inner side and the outer side.

7. The novel high-voltage circuit breaker according to claim 1, further comprising a synchronous coupler (7), wherein the synchronous coupler (7) is in a sleeve shape with an upper end being open and a lower end being closed, the upper end of the synchronous coupler (7) is fixed on the lower bottom surface of the movable end head (602) through a bolt, a sleeve containing cavity is formed in the synchronous coupler (7), the lower end of the movable main shaft (607) and an adjusting nut (603) are arranged in the sleeve containing cavity, and a connecting hole (701) is formed in a solid shaft part at the lower end of the synchronous coupler (7).

8. The novel high-voltage circuit breaker according to claim 1, further comprising a base (10), wherein three single circuit breakers are installed on the base (10) and connected to a three-phase circuit, a controller (11) and a capacitor (12) are arranged on the base (10), the controller (11) can control the capacitor (12) to discharge, when the capacitor (12) is discharged in the forward direction, the three single circuit breakers are synchronously switched on, and when the capacitor (12) is discharged in the reverse direction, the three single circuit breakers are synchronously switched off.